CA2042683C - Circuit d'interface amelioree pour ligne a haute tension - Google Patents

Circuit d'interface amelioree pour ligne a haute tension

Info

Publication number
CA2042683C
CA2042683C CA002042683A CA2042683A CA2042683C CA 2042683 C CA2042683 C CA 2042683C CA 002042683 A CA002042683 A CA 002042683A CA 2042683 A CA2042683 A CA 2042683A CA 2042683 C CA2042683 C CA 2042683C
Authority
CA
Canada
Prior art keywords
ring
tip
voltage
current
subscriber loop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002042683A
Other languages
English (en)
Other versions
CA2042683A1 (fr
Inventor
Lalit O. Patel
Michael Warner
Absar Naseer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AG Communication Systems Corp
Original Assignee
AG Communication Systems Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AG Communication Systems Corp filed Critical AG Communication Systems Corp
Publication of CA2042683A1 publication Critical patent/CA2042683A1/fr
Application granted granted Critical
Publication of CA2042683C publication Critical patent/CA2042683C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA002042683A 1990-10-18 1991-05-15 Circuit d'interface amelioree pour ligne a haute tension Expired - Fee Related CA2042683C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/599,537 US5175764A (en) 1990-10-18 1990-10-18 Enhanced high voltage line interface circuit
US599,537 1990-10-18

Publications (2)

Publication Number Publication Date
CA2042683A1 CA2042683A1 (fr) 1992-04-19
CA2042683C true CA2042683C (fr) 1998-10-06

Family

ID=24400031

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002042683A Expired - Fee Related CA2042683C (fr) 1990-10-18 1991-05-15 Circuit d'interface amelioree pour ligne a haute tension

Country Status (2)

Country Link
US (1) US5175764A (fr)
CA (1) CA2042683C (fr)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457743A (en) * 1990-09-04 1995-10-10 Tollgrade Communications, Inc. Metallic channel unit network
US5511118A (en) * 1991-01-31 1996-04-23 Northern Telecom Limited Method of providing d.c. feed to a telephone line
JP2744357B2 (ja) * 1991-04-23 1998-04-28 キヤノン株式会社 構内交換装置
US5303229A (en) * 1991-07-31 1994-04-12 Alcatel Network Systems, Inc. Optical network unit
US5323460A (en) * 1992-01-07 1994-06-21 Ag Communication Systems Corporation Enhanced subscriber line interface circuit
US5422950A (en) * 1993-05-03 1995-06-06 Teltrend Inc. Remote terminal channel unit for telephone transmission lines
US5357569A (en) * 1993-05-03 1994-10-18 Teltrend Inc. Trans-hybrid loss compensator for on hook transmission
US5347544A (en) * 1993-05-03 1994-09-13 Teltrend Inc. Gain or loss compensation circuit for telephone lines
ES2105934B1 (es) * 1994-02-25 1998-07-16 Telefonica Nacional Espana Co Circuito hibrido universal de linea.
US5581201A (en) * 1994-06-30 1996-12-03 Tandem Computers Incorporated Apparatus for unit control and presence detection
US5555301A (en) * 1994-12-21 1996-09-10 Motorola, Inc. Power supply apparatus and method for energizing telephone alerting mechanisms and circuitry
US5737411A (en) * 1994-12-29 1998-04-07 Advanced Micro Devices Inc. Battery switching in a telephone subscriber line interface circuit
US5740241A (en) * 1995-05-12 1998-04-14 Carrier Access Corporation T1 channel bank control process and apparatus
US5659608A (en) * 1995-12-15 1997-08-19 Lucent Technologies Inc. Line feed circuit with logic level controlled ringing
US5721774A (en) * 1995-12-15 1998-02-24 Lucent Technologies Inc. Longitudinally balanced, dual voltage line-feed circuit
DE19611944C2 (de) * 1996-03-26 2003-03-27 Daimler Chrysler Ag Integrierter Schaltkreis zur Kopplung eines mikrokontrollierten Steuergerätes an einen Zweidraht-Bus
US5815569A (en) * 1996-06-27 1998-09-29 Lucent Technologies Inc. Method for controlling power losses associated with line interface circuits in telecommunications networks
JPH1169392A (ja) * 1997-08-15 1999-03-09 Nec Corp 交換機加入者線路を利用した局給電方式
US6480510B1 (en) 1998-07-28 2002-11-12 Serconet Ltd. Local area network of serial intelligent cells
US7180999B1 (en) * 1999-04-22 2007-02-20 Silicon Laboratories, Inc. Subscriber line interface circuitry
AU4479600A (en) * 1999-04-22 2000-11-10 Silicon Laboratories, Inc. Subscriber line interface circuitry
US6956826B1 (en) 1999-07-07 2005-10-18 Serconet Ltd. Local area network for distributing data communication, sensing and control signals
US6690677B1 (en) 1999-07-20 2004-02-10 Serconet Ltd. Network for telephony and data communication
US6567521B1 (en) * 1999-08-17 2003-05-20 Silicon Laboratories, Inc. Subscriber loop interface circuitry having bifurcated common mode control
US7158633B1 (en) 1999-11-16 2007-01-02 Silicon Laboratories, Inc. Method and apparatus for monitoring subscriber loop interface circuitry power dissipation
US6549616B1 (en) 2000-03-20 2003-04-15 Serconet Ltd. Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US7312739B1 (en) 2000-05-23 2007-12-25 Marvell International Ltd. Communication driver
US7095348B1 (en) 2000-05-23 2006-08-22 Marvell International Ltd. Communication driver
US7433665B1 (en) 2000-07-31 2008-10-07 Marvell International Ltd. Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same
US6775529B1 (en) * 2000-07-31 2004-08-10 Marvell International Ltd. Active resistive summer for a transformer hybrid
USRE41831E1 (en) 2000-05-23 2010-10-19 Marvell International Ltd. Class B driver
US7113121B1 (en) 2000-05-23 2006-09-26 Marvell International Ltd. Communication driver
US6462688B1 (en) 2000-12-18 2002-10-08 Marvell International, Ltd. Direct drive programmable high speed power digital-to-analog converter
US7194037B1 (en) 2000-05-23 2007-03-20 Marvell International Ltd. Active replica transformer hybrid
US7486787B2 (en) 2000-06-30 2009-02-03 Silicon Laboratories, Inc. Subscriber line interface circuitry with common base audio isolation stage
US7606547B1 (en) 2000-07-31 2009-10-20 Marvell International Ltd. Active resistance summer for a transformer hybrid
US7215764B2 (en) * 2001-02-06 2007-05-08 Legerity, Inc. Current sensing echo cancellation device
IL154234A (en) 2003-01-30 2010-12-30 Mosaid Technologies Inc Method and system for providing dc power on local telephone lines
IL159838A0 (en) 2004-01-13 2004-06-20 Yehuda Binder Information device
US7312662B1 (en) 2005-08-09 2007-12-25 Marvell International Ltd. Cascode gain boosting system and method for a transmitter
US7260212B1 (en) 2007-03-30 2007-08-21 Winbond Electronics Corporation Method and apparatus for subscriber line control circuit
US8335310B2 (en) * 2007-06-16 2012-12-18 Nuvoton Technology Corporation Method and system for subscriber line interface circuit having a high-voltage MOS linefeed circuit
US8150026B2 (en) 2007-06-16 2012-04-03 Winbond Electronics Corporation Method and system for subscriber line interface circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437757A2 (fr) * 1978-06-26 1980-04-25 Trt Telecom Radio Electr Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique
US4476350A (en) * 1981-02-17 1984-10-09 Bell Telephone Laboratories, Incorporated Battery feed circuit
US4866768A (en) * 1985-06-26 1989-09-12 Siemens Corporate Research & Support, Inc. Station line interface circuit for a telecommunication network
US4685130A (en) * 1985-08-29 1987-08-04 Gte Communication Systems Corporation Subscriber line circuit having an improved loop current supply circuit
JPH0671295B2 (ja) * 1987-04-06 1994-09-07 沖電気工業株式会社 加入者線給電回路
JP2645022B2 (ja) * 1987-08-21 1997-08-25 株式会社東芝 加入者回路
US4864609A (en) * 1988-05-26 1989-09-05 Northern Telecom Limited Telephone line interface circuit
US5014305A (en) * 1989-03-16 1991-05-07 Northern Telecom Limited Line interface circuit

Also Published As

Publication number Publication date
US5175764A (en) 1992-12-29
CA2042683A1 (fr) 1992-04-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed